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<title>List Group Element</title>
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<h1>ListGroup</h1>

<p>Represents a group break level within a list.</p>

<h3>Description</h3>

<p>A list is most often divided into a number of groups. 
Groups provide a way of showing common headings for a group of related rows. 
Groups often have subtotals. For example, a sales report may show totals per 
sales rep and region.</p>

<p>A group is defined by a <i>group key.</i> The key is a 
column from the query. If the group key is a time field then user often want to 
group on an <i>interval</i> such as month or quarter.</p>

<h3>See Also</h3>

<h2 class="slot">header</h2>

<p>The header band for this group.</p>

<h3>Description</h3>

<p>The header band appears before the first detail row of a 
group. This band contains any number of sections. Sections appear sequentially 
one after another, or can be selected conditionally.</p>

<p>Report items within the header slot have visibility to 
the entire result set. If the header contains a simple element such as a data 
item, then it will display values from the first row of the group. If the header 
contains a chart, then the chart displays rows from the entire group. If the 
header displays an aggregate, then the aggregate is computed over the entire 
group.</p>

<p>In the default style, n is the group nesting level. n=1 is the topmost group, 
n=9 is the bottom-most group.</p>

<h3>See Also</h3>

<h2 class="slot">footer</h2>

<p>The footer band for this group.</p>

<h3>Description</h3>

<p>The footer band appears after the last detail row of a 
group. This band contains any number of sections. Sections appear sequentially 
one after another, or can be selected conditionally.</p>

<p>Report items within the footer slot have visibility to 
the entire result set. If the footer contains a simple element such as a data 
item, then it will display values from the first row of the group. If the footer 
contains a chart, then the chart displays rows from the entire group. If the 
footer displays an aggregate, then the aggregate is computed over the entire 
group.</p>

<p>In the default style, n is the group nesting level. n=1 is the topmost group, 
n=9 is the bottom-most group.</p>

<h3>See Also</h3>

<h2 class="method">onPrepare</h2>
<p>It is for a script startup phase. No data binding yet. The design of an element can be changed here.</p>

<h3>Description</h3>
<p>It is for a script startup phase. No data binding yet. The design of an element can be changed here.</p>

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